write about potential energy
Answers
In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
POTENTIAL ENERGY :
Energy possessed by a body by virtue of it's position is called potential energy
Mathematically potential energy is expressed as the product of three terms , they are mass of the body , acceleration due to gravity , displacement produced in the position of the body
PE= mgh
Potential energy depends on mass and displacement of the body
For different masses and different heights , potential energy changes
UNITS :
C.G.S system = Erg or dyne
S.I system = Joule or N-m
EXAMPLES :
Stone at some height
Compressed spring
Stretched bow
NOTE :
Potential energy of the body on the surface of the earth is zero
Potential energy and work have same units
When height of the body increases , then the Potential energy of the body increases
When the height of the body decreases , the Potential energy of the body decreases